Vacuum tank



A. P. SACCO VACUUM TANK Filed July 28. 1924 May 4 1926.

am I l m Patented May l4,1926. I 4

ANDREA PASQUALE SACCO, F GENOA, ITALY.l

VACUUM TAN K.

Application mea my as, i924. serial No, 728,747'.-

' To all whom it may concern.'

. 'IheseA rece upper ends o Be it known that I, ANDREA PAsQUALn SACCO, asubject ofjthe `King of Italy, residing at Genoa, Italy, have invented anew and useful Vacuum Tank, of which the following is a specification.

` This invention relates to improvements in vacuum tanks of the type inwhich a float is employed to control the admission of air and theapplication of suction to the tank, and the discharge of fuel from thetank.

One of the objects of the invention is to provide a rotar disk valve inthe line of communication tween the engine and the .vacuum tank,andimproved means for operating this valve with a snap or jerk so that thevalve will be instantaneously opened or closed.

A further object of the invention is to -provide an air admission valvealso controlled by the last mentioned means, said means in turn beingunder the control of the usual float.

Another object of the invention 1s to provide a novel valve forcontrolling the discharge of fuel from the inner to the outer chamberofthe vacuum tankf` With the foregoing objects outlined and with otherobjects in view which will appearas the description/proceeds, theinvention consists in the novel features hereinafter described indetail, illustrated in the accompanying drawings, and `more particularlypointed out in the appended claims.

Referring' to the drawings: l ,'Fi ure l 1 is a vertical diametricalsectiona view f the improved 4vacuum tank.'

Fig. 2-is.a. similar view -of the upper por- Y tion of the tank takenfat right angles to Fi .l 1 andl ith parts broken away. lig. 3 is bottomplan view of a portion of the inner vessel. I

' Fig.- 4 is a top plan view of the tank. i y In the drawings, 1 is theusual outer receptacle containing', an inner'receptacle 2. les areconnected at their y aring 3 and screws3. One

'these screws, as

air constantly into the outer chamber 1. A.

capa is arranged at the upper ends of the- 'to the intake manifolofthe-engine. The

bestshown in lFigs. 2 and 4, has a hole 3 through the same to admit v,lower portionv of the receptacle 1 is adapted tofbe vconnected'to thecarbureter of the engine and a valve-7 is provided at this point forregulating the feed'of fuel'to the carbureter. A n

A rectangular casing 8 is arranged in the lower 'portion 'of the chamberA2 and has apertures 8 to permit the fuel to flow from the inner chamberto the outer chamber. Two pivotally mounted valves 9 cooperate withthese apertures and these valves are carriedby la, double-armed lever10-pivot ally mounted ona vertical shaftll.' It will be noted that onearm of the lever 10 is shorter than the other so that the two valveswill have different displacements during operation, the valve of theshort arm having a very small movement and the valve of the long arm arelatively greater movement. Such an arrangement has for i'ts object tocause the valve ofthe short 'arm on the suct-ion phase, to beinstantaneously drawn to its seat and to transmit themovement to thevalve on the long arm, to provide sensitiveness and instantaneousclosure of thel 'aper-,

tures 8, while during the delivery phase, the valve on the long arm,being at a greater distance from its seat than the other valve, willallow the passage of larger quantities of fluid. The short arm of thelever carries a projection 10 adapted to abut against one side of thecasing and thereby form a stop so that the. valves will not open'toofar. A cross bar 8c extends across the lower open end lof the casing andsupports the lower end of the shaft '11.

A verticalpin 12 extends upwardly from the casing-8 and acts asa guidefor a sleeve 13 which carries at its u per end a vertical pin 14 securedto the tub the ends of which project be ond diametrically op os-itesides of the tu is slida ly mounted on the tube and. is adapted in.rising to strike the projecting ends 'of the pin 15 for raising the rod14, while the float vin .descending vwill strike e. 13'by a. pin la,

. A oat 16l asi loo

a'flange 17 at the lower end-of the tube for lowering the -pin '14.

As best shown in Figures 1 and 2, the suction connection 16 leads into abox 18 arranged within the chamber 2. VThis box is provided 'n one ofits walls with a circular.

series of 'aperturesl which are adapted to register during thesuctionphase witlraper-V tures `20-arranged in a circular -series V1nthe disk valve 21, which" latter is rotatably mounted on the box 18. Itis obvious that when the valveI isturned to cause the apertures 2O tomove.out of register with the apertures-of the box 18, the applicationof engine suction will be cut oli". vThe valve 21 is provided withprojecting varms 23 adapted to be struck by a pin 22 fixed on 'andprojecting from the pin 14. A bearing block 24 is fixed toA the cap 4and pivotally l supports levers 25 carrying counterweights 26. Theintermediate portions of these levers are pivotally 'connected totheouter ends of links 27 which have their opposite ends pivotallyconnected to a block 28 fixed on th pin 14. The pin 14 is provided' atits uprer end with a head 29 which moves in a f statlonary tube .30 andis adapted to displace a ball 'valve 31, arranged in the tube l- 30 andadapted to-control the admission of 20,1 outside air -to theinnerlchamber 2.

fi.; links 27. will be l'uscend and strike the liange 17 so that thepulled downwardly With a.

erk and the head 29 will. release the ball In operation, thel floatvalve 16 will dealve 31 and permit the same to close. Imediately afterthis the pin 22 will strike the lower one o f the arms 23 and swing thevalve 20"so that the openings in this valve communicate withthevopenings .in the box 18.- At this rtime, it is obvious, that thechamber 2 will beclosed to atmosphere and that -enginesuction will beapplied to the chamber 2. This -suction will snap the valves 9 intoclosed position, and then the suction Vwill be created in the connection5 lso that fuel wrillbe drawn from the main supply tank into the chamber2. This action will continue until the float 16 rises sufficiently tostrike the pin ,.15 and move the block 28 4upwardly until the links 27move slightly beyond a horizontal position, at which time, thecounterweights 26 will `fall and cause the pin 14 to' move up with asnap, and the arm22 willI strike the upper arm 23 and again close thevalve 21. Immediately-afterthe valve 21 is closed the pin 14 will risesufficiently to cause the head 29 to 4unseat the Avalve 31, so thatoutside air will again" be admitted to the chamber 2. At this time thevalves 9 will open under the v'influence of the pressure exerted by thefuel inthe .chamber 2 and kthe .fuel will A flow fromchazmber 2 intochamber l.l

From the foregoing it is believed that the construction, operation andadvantages of the invention maybe readily understood, and itis apparentthat changes may 'be made in the details disclosed -Without de? partingfrom the spirit of the invention as expressed in the claims. l

What I claim and desireto secure by l Letters-Patent is 1. A vacuum tankincluding a normally closed chamber having a fuel inlet, a fuelconnection to apoutlet, an air inlet and a ply suction to the interiorof the chamber, a float .arranged in the chamber, a valve forcontrolling the suction connection, pivotally mounted levers arranged inthe chamber, counterweights supported. by said levers, a rod `on whichthe float is slidably mounted, links pivotally connecting the rod tosaid levers and adapted to be moved by the rod to both sides ofv a linedrawn through the points at which the links are pivotally connected'tosaid levers so that the counterweights may move the rod with a jerkimmediately after the inner ends of' the links pass to oneside or theother of said line, means operatively connecting said rod with saidvalve to permit the rod to vopen and close the latter, spaced abutmentsfloat on the rod, and a valve for controlling the fuel outlet of thechamber.

on the rod to limit the movement`of the.A

2.-A vacuum tank as claimed inv claim `l including a Valve forcontrolling the air inlet of vthe chamber, and means actuated 'by saidrod for controlling the last mentioned valve.

3. The combination with a vacuum. tank having a valve controlled byafloat, of pivotally connected links forming a parallelogram, a valveactuating member connected to a pair of said links, and counterweightsconnected to the other pair of said links.

4. In a vacuum tank, an inner chamber Y having a fuel outlet including aplurality of apertures, a pivotally mounted doublearmed lever, valvescarried by the arms of the lever for closing said apertures, one of saidarms being longer than the other as and for the purpose described. v

In testimony whereof I -have name to this specification.

ANDREA rAsQUALE sAcco.- y

l signed my

